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The concept of culture as implemented in EU3 is a gameplay factor designed to affect expansion. In the game, cultures are divided into groups. Each province has one dominant culture, and each country has one primary culture and possibly one or more accepted cultures.

It is worth noting that culture and culture groups are not tied to language. For example, Hungarian is part of the West Slavic group even though the Hungarian language is part of the Finno-Ugric family.

Culture groups

As mentioned above, all cultures are grouped into culture groups. As an example, the Scandinavian group consists of Danish, Norwegian and Swedish. As defined in Cultures.txt:

scandinavian = {
swedish
danish
norwegian
}

European:

Germanic

Scandinavian

British

Gaelic

Latin

Iberian

French

Basque Group

Finno-Ugric

South Slavic

West Slavic

East Slavic

Baltic

Byzantine

Turko-Semitic

Primary culture

All countries have one, and only one, primary culture. Provinces with this culture have no tax income penalties from culture. Provinces from another culture within the same group has a 10% tax income penalty.

Accepted culture

If a culture becomes a significant minority within a country, they can gain the status as accepted culture. The criteria for "significant minority" is that it represents 20% or more of the base tax value in all your core provinces (not just the ones you own) and that you own at least one core of that culture. As of v.1.3, a culture loses it's accepted status if it drops below 5%. These percentages can be changed in defines.txt.

Provinces of an accepted culture have, like primary culture provinces, no income penalties from culture. Provinces with a culture that isn't in the primary culture's group or an accepted culture has a 30% tax income penalty.

Culture Change

There are a few ways to change a province culture:

Colonies

If an unclaimed province has natives then they have a particular culture and religion, by sending your colonists you not only gain ownership of the province but change the culture and religion to your own.

If you "gain" a colony of another nation, you can change the culture/religion by sending one of your own colonist, IF he arrives before the colony growing to 900 settlers... in other words if your colonist arrives and the result is still a colony (up to 999 settlers) then you get the culture/religion change.

You can use the Spy action Incite Natives before gaining your enemy's colony in order to reduce the settlers below 900 so after gaining ownership you can convert it to your own culture/religion.

Cities

Once the province grows into a city it won't fall bellow 1000 population no matter what, there is no way to devolve the city into a colony.

There *MIGHT* be an exeption to this, it seems that a province controlled by rebels can fall bellow 1000 population and devolve into a colony, it's quite difficult since it takes forever and rebels end up defecting, and you have to make sure the province is actually LOSING population.... FURTHER CONFIRMATION REQUIRED!!

Nevertheless if the province has a Pagan Religion sending a missionary will turn it into your own religion AND culture. For city provinces with non-Pagan religions in "In Nomine" you could use the Religious Rebels to change the province religion into Pagan and then use missionary conversion.

Cultural Assimilation Event

List of Culture Groups (In Nomine and Heir to the Throne)

Several culture groups are assigned a cultural union state. These states do not suffer from the same cultural group tax penalty. For example, France does not suffer any penalties from Norman or Gascon provinces despite having Cosmopolitaine as its primary culture.

Most notably, Turkish culture has been grouped with all the Arabic cultures since In Nomine. This encourages the Ottomans to historically expand into the generally poor Arabic lands without stiff economic penalties. Among other minor changes, Highland and Lowland Scottish have been combined into Scottish.

GermanicUnion: Germany

Pommeranian

Prussian

Hannoverian

Hessian

Saxon

Rheinlaender

Bavarian

Austrian

Dutch

Flemish

ScandinavianUnion: Scandinavia

Swedish

Danish

Norwegian

BritishUnion: Great Britain

English

American

Scottish

Gaelic

Welsh

Breton

Irish

LatinUnion: Italy

Lombard

Umbrian

Sicilian

IberianUnion: Spain

Castillian

Catalan

Galician

Andalucian

Portugese

Maltese

FrenchUnion: France

Cosmopolitaine

Gascon

Normand

Aquitaine

Burgundian

Occitain

Wallonian

Basque

Basque

Finno-Ugric

Finnish

Estonian

Sapmi

Ingrian

Karelian

South Slavic

Croatian

Serbian

Bulgarian

Romanian

Albanian

West Slavic

Czech

Slovak

Polish

Hungarian

Schlesian

East SlavicUnion: Russia

Russian

Byelorussian

Ruthenian

Baltic

Lithuanian

Old Prussian

Latvian

ByzantineUnion: Byzantines

Greek

Georgian

Armenian

Turko-Semitic

Turkish

Maghreb Arabic

Al Misr Arabic

Al Suryah Arabic

Al Iraqiya Arabic

Bedouin Arabic

Berber

IranianUnion: Persia

Persian

Baluchi

Khorasani

AltaicUnion: Mongol Khanate

Azerbadjani

Turkmeni

Mongol

Uzbehk

Khazak

Kirgiz

Uralic

Siberian

Yakut

Tartar

Central American

Zapotec

Mayan

Aztec

South American

Inca

Guarani

Aimara

Amazonian

Patagonian

Guajiro

Teremembe

Tupinamba

Mataco

Caribbean

Arawak

Carib

North American

Dakota

Cherokee

Pueblo

Aleutian

Inuit

Cree

Iroquis

Huron

Navajo

Shawnee

Delaware

Creek

East Asian

Japanese

Manchu

Chihan

Cantonese

Korean

Mon Khmer

Khmer

Mon

Vietnamese

Malay

Polynesian

Cham

Malayan

Filipino

Madagascan

Sulawesi

Thai

Central Thai

Lao

Northern Thai

Shan

Burman

Burmese

Tibetan

Chin

Pacific

Papuan

Aboriginal

Melanesian

Moluccan

Eastern Aryan

Assamese

Bengali

Bihari

Nepali

Oriya

Sinhala

Hindusthani

Avadhi

Kanauji

Panjabi

Kashmiri

Western Aryan

Gujarati

Marathi

Sindhi

Rajput

Dravidian

Kannada

Malayalam

Tamil

Telegu

African

Madagasque

Tuareg

Senegambian

Dyola

Nubian

Somali

Bantu

Swahili

Ethiopian

Kongolese

Shona

Mali

Yorumba

Aka

Ashanti

Note that some of these culture groups only appear in uncolonized, unowned provinces.

List of Culture Groups (EU3 and Napoleon's Ambition)

Germanic

Pommeranian

Prussian

Hannoverian

Hessian

Saxon

Rheinlaender

Bavarian

Austrian

Dutch

Flemish

Scandinavian

Swedish

Danish

Norwegian

British

English

American

Lowland Scottish

Celtic

Highland Scottish

Welsh

Breton

Irish

Latin

Lombard

Umbrian

Sicilian

Iberian

Castillian

Catalan

Galician

Andalucian

Portugese

French

Cosmopolitan French

Gascon

Normand

Aquitaine

Burgundian

Occitain

Wallonian

Basque

Basque

Finno-Ugric

Finnish

Estonian

Sapmi

Ingrian

South Slavic

Slovenian

Croatian

Serbian

Bulgarian

Romanian

Albanian

West Slavic

Czech

Slovak

Polish

Hungarian

Schlesian

East Slavic

Russian

Ukrainian

Byelorussian

Ruthenian

Baltic

Lithuanian

Old Prussian

Latvian

Byzantine

Greek

Georgian

Armenian

Semitic

Maghreb Arabic

Al Misr Arabic

Al Suryah Arabic

Al Iraqiya Arabic

Bedouin Arabic

Maltese

Berber

Persian

Persian

Azerbadjani

Baluchi

Kurdish

Altaic

Turkish

Turkmeni

Mongol

Tunguz

Pashtun

Tajihk

Uzbehk

Khazak

Kirgiz

Uralic

Siberian

Yakut

Tartar

Central American

Zapotec

Mayan

Aztec

South American

Inca

Guarani

Aimara

Amazonian

Patagonian

Guajiro

Teremembe

Tupinamba

Mataco

Caribbean

Arawak

Carib

North American

Dakota

Cherokee

Pueblo

Aleutian

Inuit

Cree

Iroquis

Huron

Navajo

Shawnee

Delaware

Creek

East Asian

Japanese

Manchu

Chihan

Cantonese

Korean

Mon Khmer

Khmer

Mon

Vietnamese

Malay

Polynesian

Cham

Malayan

Filipino

Madagascan

Sulawesi

Thai

Central Thai

Lao

Northern Thai

Shan

Burman

Burmese

Tibetan

Chin

Pacific

Papuan

Aboriginal

Melanesian

Moluccan

Eastern Aryan

Assamese

Bengali

Bihari

Nepali

Oriya

Sinhala

Hindusthani

Avadhi

Kanauji

Panjabi

Kashmiri

Western Aryan

Gujarati

Marathi

Sindhi

Rajput

Dravidian

Kannada

Malayalam

Tamil

Telegu

African

Madagasque

Tuareg

Senegambian

Dyola

Nubian

Somali

Bantu

Swahili

Ethiopian

Kongolese

Shona

Mali

Yorumba

Aka

Ashanti

Note that some of these culture groups only appear in uncolonized, unowned provinces.